Improvement in lanterns



e. W ALLINGFORD.

. Lantern. No.132,995. Patented N0v.12,1872.

e 3 0 0 0 @006 O O 9 9 0 0 0 0 0 9 o o o" 0 9 0 00009 @356 am. Wallnoforcl AM PHOTO-UTHDGRAPHIC COJVX (OSEORNE S PROCESS.)

GILBERT WALLINGFORD, OF GHARLESTOWN, A SSIGNOR TO HIMSELF AND SAMUEL F.HOLT, OF SOMERVILLE, MASSACHUSETTS.

IMPRQVEMENT' IN LANTERNS.

Specification forming part of Letters Patent No. 132,995, dated November12, 1872.

To all whom it may concern:

Be it known that l, GILBERT WALLING- FORD, of Oharlestown, of the countyof Middlesex and State of Massachusetts, have invented a new and usefulImprovement in Lanterns; and do hereby declare the same to be fullydescribed in the following specification and represented in theaccompanying drawing, of which Figure l is an elevation, and Fig. 2 avertical section of one of my improved lanterns.

It is intended especially for use on railways as a signal-lantern.

In the drawing, A denotes the lamp resting upon a fiat annulus orcircular shelf, B, from which there is extended upward, concentricallywith the lamp, a hollow frustum, 0, there being an air-space, D,extending about the lamp and between it and the frustum O. The upperpart of the frustum is perforated with numerous holes, a a, 860., andthe frustum and shelf are supported in position within and concentricwith the outer bottom case E by two series of arms, I) 0, extended fromsuch frusturn and shelf to the case.

Figureli is ahorizontal section taken through one series of each arm;and Fig. 4 is a horizontal section taken through the other series ofthem.

The lower part or foot of the glass globe G rests upon the upper arms,and fills the space which is above them and between the frustum O andouter case E. The said outer case has a circular door-way through itsbottom, to which a circular door or cover, H, is hinged, it beingprovided with a slide-bolt, I. Over and parallel to the door is a disk,K, supported by standards erected on the door. Through the door there isa circular range of air-holes, d, and there is also one or more rangesof airholes, 6, made through the case E opposite to the space which isbetween the door and the disk. The disk is also perforated with numerousholes.

From the above it will be seen that the air to supply the flame of thelamp has to enter the lantern through the holes d and e, from whence itpasses into the space between the disk; thence up through and around thedisk;

thence up into the space around the frustum,

and thence through the holes of the latter,

whereby it becomes so divided into numerous currents as to be equallydistributed upon the flame, and in a manner to prevent it fromflickering, however the lantern may be movedviz., whether upward ordownward or laterally. The hood or that part of the lantern which isabove rests upon the glass globe, is composed of a case, L, having holesg in its top, and

over the same a circular concavo convex cap,

M, upheld by standards h. Within the said hood and extending upward fromthe glass globe is a hollow conic frustum, N, open at top and bottom andhaving ranges of holes, 1', arranged through its sides. There is also arange of holes, is, made through and around the hood at or about itsmiddle, said range being provided with a deflector, 1, arranged withthem, as shown. A spider, 0, formed as shown, extends up from a flange,I projecting from the lower part of the hood. The smoke and volatileproducts of combustion will escape through the upper end and the holesiof the frustum N and pass off through the holes in'the top and sides ofthe hood, which, being provided with the cap M and deflector Z, asdescribed, will be protected from rain, snow, or ice. The hood, itsair-holes, and their caps, and the frustum with its perforations, allarranged as described, have been found, in prac tice, to admit of thefree escape of the smoke and volatile products of combustion, and not toaffect the steadiness of the flame of the lamp, however the lantern maybe moved or swung about or be exposed to atmospheric currents.

I claim- 1. In the said lantern, the perforated frustum G, the annularshelf B, the outer case E, perforated as described, the perforated diskK, and the door H, arranged, constructed,

and combined substantially in manner as described. v

2. Theperforated frustum N and lanternhood L, the cap M, and deflector1, constructed, arranged, and combined substantially as specified.

GILBERT WALLINGFORD.

Witnesses R. H. EDDY, J. R. Snow.

